DARN, I ALMOST BEAT IT!!!
My second game was much better, I really improved my strategy: Stage 17, 230 Kills.
Here are a few hints (for anyone that cares) which helped me:
- Constantly unload the revolver, really quickly (but make sure you're accurate): the faster you shoot, the faster they die, the sooner you reload
- Try to shoot zombies coming out of the ground as soon as possible because they're an insta kill if they're not walking yet - this will save you time and ammo farther down the road
- this kinda ties into #1, but if you are left standing with no zombies around for a few seconds, and you have 3 or less bullets left in the revolver, unload your rounds so that you can start fresh with 6 in preparation for the next wave of zombies
- although my first instinct was to shoot for the head, it's really best to go for the legs - it will slow the zombies down tremendously if you take them out at the legs, causing them either to stutter or fall over - this is a big timesaver when you get 5-10 zombies coming at you.
- Use the shotgun as a last resort weapon against a crowd of zombies if you think you're nearing death - otherwise stick with the revolver